Neither of the 0.7.0 changelogs is part of the published package or is
reachable from the documentation, so only the one for 0.8.0 is kept.

Its note about empty parameter lists gains the `Deref` and `DerefMut`
exception: they take no parameters at all, so `#[educe(Deref())]` is rejected
even though `#[educe(Deref)]` is accepted.